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HG/T 20553 IaとGB/T 8163の違い

2017-03-22View Original

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提供された配管登録表には、HG/T 20553 IaとGB/T 8163の両方の規格が記載されており、発注者から間違って書いたのではないか、なぜ二つも記載するのかと尋ねられました
Reply #22017-03-22
HG/T 20553 Iaは寸法規格で、管の外径を定めています。GB/T 8163は材質規格で、鋼管の材質基準を定めており、重複しません
Reply #32017-03-22
上のが正解です。一つは鋼管の外径寸法で、もう一つの規格は製造基準と材質を示しています

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